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Device and method for exerting force on circuit mounted on board through opening of the board to facilitate the thermal conduction between circuit and housing

  • US 5,437,041 A
  • Filed: 07/01/1992
  • Issued: 07/25/1995
  • Est. Priority Date: 02/26/1992
  • Status: Expired due to Term
First Claim
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1. An add-on electronic device for insertion in an electronic apparatus through a designated opening having at least a first processor capable of performing logical operations and executing processing steps stored in a first memory connected thereto, a connector configured to receive said add-on device which is coupled to at least an address signal line of the first processor and to an address output converter that converts data into address signals and provides them to the connector, comprising:

  • a housing having a first portion and a second portion;

    a printed circuit board arranged in said housing, wherein a first surface of said printed circuit board faces said first portion and a second surface of said printed circuit board faces said second portion and wherein said printed circuit board comprises a mounting area having an opening;

    at least one circuit comprising a second processor configured to perform processing substantially independent of the first processor, wherein said at least one circuit is mounted on said first surface of said printed circuit board in said mounting area, wherein at least a portion of said at least one circuit is arranged over said opening of said printed circuit board such that a first surface of said at least one circuit faces said first portion of said housing and a second surface of said at least one circuit faces said second portion of said housing;

    thermal conduction means disposed between said at least one circuit and said first portion of said housing for conducting thermal energy generated by said at least one circuit to said housing; and

    bias means disposed between said second surface of at least one circuit and said second portion of said housing and extending through said opening of said printed circuit board for exerting a net force on said circuit in a direction towards said first portion of said housing.

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